bugfix: free any extra results so CALL commands don't fail

simpletest/CallTest.php

@@ -0,0 +1,17 @@
+<?php
+class CallTest extends SimpleTest {
+  function test_1_create_procedure() {
+    DB::query("DROP PROCEDURE IF EXISTS myProc");
+    DB::query("CREATE PROCEDURE myProc()
+    BEGIN
+      SELECT * FROM accounts;
+    END");
+  }
+
+  function test_2_run_procedure() {
+    $r = DB::query("CALL myProc()");
+    $this->assert($r[0]['username'] === 'Abe');
+    $this->assert($r[2]['age'] === '914');
+  }
+
+}